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demasrv I see you got into your rebuild! One good inexpensive way to find if you have this problem is to look at your oil filter. Like I did here with pics
https://www.ft86club.com/forums/showthread.php?t=146429
I found flakes/chunks of sealant there and so I dropped the pan and found some shit, not as much as you. Then installed the killerB. My engine is stock but had to reseal for timing cover leaks and it still happened
I mentioned used oil analysis, but I found another place that does use oil filter media analysis haha, more expensive and mostly for industrial/ships/planes applications but probably can be applicable here if you think you have a problem. UOA doesn't pick up solid particles you can see with your eyes